package com.tangdi.merchantsign;

import java.security.MessageDigest;

/**
 * 商户MD5签名
 * 
 * @author liuyanwei
 * 
 */
public class TdMerSign {
    /**
     * 商户MD5签名
     * @param inStr  签名原数据
     * @return 经过MD5加签后的数据
     * @throws Exception
     */
	public static String MD5Sign(String inStr) throws Exception {
		MessageDigest md5 = null;
		try {
			md5 = MessageDigest.getInstance("MD5");
		} catch (Exception e) {
			System.out.println(e.toString());
			e.printStackTrace();
		}
		char[] charArray = inStr.toCharArray();
		byte[] byteArray = new byte[charArray.length];

		for (int i = 0; i < charArray.length; ++i) {
			byteArray[i] = (byte) charArray[i];
		}
		byte[] md5Bytes = md5.digest(byteArray);

		StringBuffer hexValue = new StringBuffer();

		for (int i = 0; i < md5Bytes.length; ++i) {
			int val = md5Bytes[i] & 0xFF;
			if (val < 16)
				hexValue.append("0");
			hexValue.append(Integer.toHexString(val));
		}
		String outStr = "";
		outStr = hexValue.toString();

		return outStr;
	}
}
